Chain jack.



PATENTED NOV. 8, 1904.

J. M. BUTHER.

CHAIN JACK.

' APPLICATION FILED FEB. 13, 1904.

N0 MODEL.

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Fig. 4.

4 MHIIIIIIIM Fig, 6.

Inventor:

Witnesses: y [j Attorneys.

UNITED STATES Patented November 8. 1904.

PATENT OEEICE.

JAMES M. BUTOHER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO JAMES-v BANNERMAN AND HENRY H. CARR, OF ST. LOUIS, MISSOURI.

CHAIN JACK.

SPECIFICATION' forming part of LettersP'atent No. 774,231, dated November 8, 1904. Application filed February 13, 1904. Serial No. 193,413. (No model.)

To rr/ZZ whom, t may concern.-

lifted by the jack, to provide an automatically-releasing rim-engaging hook for a chain jack, and other objects hereinafter appearing.

My invention consists in the parts and in thearrangements and combinations of parts hereinafter described and claimed.

In the accompanying drawings, forming a part of this specification, and wherein like symbols refer to like parts wherever they occur, Figure l is a view of acar-truck with my improved chain jack on one of the wheels in its initial position. Fig. 2 is a similar view showing the bearing-box raised by the jack after the truck has been moved to the left. Fig. 3 is a detail view, on an enlarged scale, showing the hook of my improved chain jack on a wheel. Fig. 4 is a vertical sectional view of the parts shown in Fig. 3, and Fig. 5 is a top view of the hook.

My improved chain jack consists of a chain l and a wheel-rim clamp 2, mounted on the end of the chain. The clamp 2 consists of a hook 3, conforming in shape to the outline of tread and flange of an ordinary car-wheel, as illustrated in Figs. 3 and 4. The shank 4 of the hook extends beyond the tread of the wheel and is provided with a slot 5, having its outer end wall 6 curved. Awedge 'Tis mounted in the slot 5 and is provided with i an eye 8, to which the chain l is attached.

In use the clamp 2 is placed on the rim of a wheel 9 at one side of its highest portion. The chain l is passed under the bearing-box l0, over the bottom bar ll of the truck, and back over itself and under the bearing-box. It is pulled taut, and thus the wedge 7 is pulled down so as to clamp the wheel-rim between itself and the hook 3. The clamp is held securely in position by this adjustment. This arrangement is illustrated in Fig. l. Then the car may be moved to the left, as illustrated, and the wheel will carry the clamp 2 upwardly. The bearing-box l0 will be lifted with the chain, and after aslight movement of the car to the left the parts will occupy the position illustrated in Fig. 2. The weight of the car and the bearing-box l() are lifted off the brass 12 and the car-axle, and the former may be easily withdrawn and replaced or another inserted. Then by moving the car to the right the load is gradually returned to the car-axle. When the wheel moves back beyond its initial position, the tension on the chain l ceases and the wedge 7 is no longer held down. Hence the clamp 2 is free to fall off the wheel and will be pulled to one side by the weight of the chain 1. The construction of the clamp prevents its getting stuck on the wheel-rim and being carried down to strike and injure the brake.

Obviously my device is capable of considerable modication, and therefore I do not wish to be limited to the specific construction shown and described.

What I claim as my invention, and desire to secure by Letters Patent` isl. A chain jack comprising a chain and a wheel-rim clamp having relatively movable members, said clamp being arranged to be tightened by the load being lifted.

2. A chain jack comprising a wheel-rim clamp having relatively movable members, one of said members being a hook substantially conforming to the shape of a Wheel-rim and a chain attached at only one end to said clamp.

3. A chain jack comprising a chain and a wheel-rim clamp having a hook substantially conforming to the shape of a wheel-rim, and a relatively movable member arranged to engage the opposite side of the wheel-rim and clamp the same, said chain being connected to said clamp at one end only.

4. A chain jack comprising a chain and a wheel-rim clamp having a member arranged to engage one side of the wheel-rim and a relatively movable member arranged to engage the opposite side of the Wheel-rim, said ehain being connected to one of said members to aetuate said clamp.

A chain jack Comprising a chain and a Wheel-rim clamp comprising a hook arranged to engage one side of a Wheel-rim and having' a slotted shank, and a wedge arranged in the 4slot in said shank and arranged to engage the opposite side of the Wheel-rim, said chain being Connected to said Wedge.

6. A chain jack comprising a chain and a Wheel-rim Clamp comprising a hook substantially Conforming to the shape of a wheel-rim and having a shank provided with a slot having its outer end Wal Curved, and a Wedge arranged in said slot to bear upon said curved Wall and the wheei-rim, said chain being connected to said Wedge.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

l JAMES M. BUTCHER.

Witnesses:

A. Gr. GODAIR,

FRED F. REISNER. 

